﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using 类的继承与多态;

namespace 类的继承与多态
{
    interface Icart
    {
        bool Add(product p);
        bool remove(int dex);
        bool updata(int dex);
        object find(int dex);
        void show();
    }
}
